proc.c:8: Warning: `z' shadows previous declaration
	Previous declaration: proc.c:8
proc.c:10: void argument must be first
proc.c:12: Warning: `x' shadows previous declaration
	Previous declaration: proc.c:4
proc.c:14: First argument cannot be `...'
proc.c:16: argument without a name
proc.c:18: argument without a name

Compilation Failed: 4 errors, 2 warnings
